/Engine/Plugins/Runtime/Metasound/Source/MetasoundFrontend/Public/MetasoundFrontendController.h
Attempts to find an existingMetasoundclass description corresponding to a dependency which matches the provided class information. If the class is not found in the current dependencies, it is added to the dependencies. If found and bInRefreshFromRegistry is set (optional) , copies the version found in the registry to the document.
A pointer to the object, or nullptr on error.
[FConstClassAccessPtr](API\Plugins\MetasoundFrontend\FConstClassAccessPtr) FindOrAddClass ( const [FNodeRegistryKey](API\Plugins\MetasoundFrontend\FNodeRegistryKey) & InKey, bool bInRefreshFromRegistry )